Hi Matabele,
 

> If anyone can come up with a filter operator to achieve this -- then this 
> filter could be employed with the widget.
>

I don't think this is a filter operator, but rather an extension to the 
EditTextWidget whereas the current selection is bound to a state. would we 
have the convention that states are tiddlers (which we don't, 
unfortunately), then we could have stuffed that state into some field of 
the same state tiddler. But since we don't we have the problem of what to 
do, if the state was a field or index of some tiddler. Possibly the 
EditTextWidget could have a selection attribute that would qualify a state 
tiddler where the selection is stored. However, encoding that selection so 
that whatever code knows to pick it back up would need a bit of fiddling, 
but possibly be similar to the PopupMechanism.

Best wishes,

Tobias.

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